* Created IController class as interface for Character.

* Created AIController class.
* Created HumanController class. (Refactored from Controller class)
* Created Level class.
* Deleted Controller class. (Redundant)
*  Refactored Armor, Character,  and Weapon class; modified Name property to only accept valid input.
* Refactored GameSave class.
* Refactored GameSaveXMLWrite class. (works properly now!)
* Corrected Rectangle class access modifier.
* RPGgame class now tests GameSaveXMLWriter class.
* Adjusted all unit tests to check for thrown exceptions.